Expansion- bolt



(No Model.) v

I. CHURCH. EXPANSION BOLT.

No. 527,406 Patented Oct. 16,1894.

29 g wmu rectangular orothor' exterior formation.

l the bolt in position.

tions on lines X X and Y Y, respectively oi spectively on the same linesof a liar-"redo fire-res Ferrari? firewall..

ISAAC (JUURGH, OF 'l( )LEDO-, ()IIIO.

ereaweaoa eorn SPECIFICATION forming part of Letters Patent I l'o.52?,516, dated October 16, 189 4:;

- Application filed llrcembcr 1,1393. Serial No. 492,438. (Ndmodel-lbeinghacl to the accompanying drawings, and

to the numerale of reference marked thereon, which form. part of thisspecific My invention relates to an e and has for its object, to 1 widean t an ble shell or missing having inclined sides upon WlllO-ll aninclined out may he dra a to ere pand the samawith the base of the shellex tending traosvereely across its diameter to serve era a contact pointfor the end the bolt, to cause the not to travel alongthe thread of thebolt as soon as the contact is attracted.-

A further object is to coustruot an. experieilole shellllavlug inverselyinclined. nterior sides, and means for expanding the shell at all pointsalong its length.

-A further obj out is to construct an expand ing shell with an interiorinclined surface, either round, rectangular, hexagonah'or polygonal incross section to allow closing either round, winged expanding devicee orthose of The invention consistsin the parts and. com. bination of parts,hereinafter described and pointed out in the claims.

In the drawings: Figure 1 iii a side view of the expansion bolt locatedwithin the pelvic ration of an object in which itis to he secured,

parts. Fig. 2 is a longitudinal transverse eeotion of the shell andexpanding devices, with In these two viewe 's, the shell is shown priorto being expandeth llig. 3 is a longitudinal trausveree .ecotloi'i otthe shell and expanding devices, showing the shell expanded. Figs. l and5 are crose ec-- Fig. 2. Figs. 6 and 7 are cross sections remodifiedform of construction.

1 designates the expansible shell, compris ing two semi-ciro ularsections in exterior cross section; each section having a transversebottom web 2, preferably formed with a right-- angled flange 3transversely perforated to eceive a headed. rivet 4: of greater lengththan the thickness of the two iianges,to' ElllOlY the sections of shellto separate tothe desired or pen ion. lliaoh semicircular section isprcferahly flanged at the upper end, thereby formiog a concentric ring 5uporith'e interior, and centrally of the circumference of each sectionthere is a longitudinal slot 6, extending from the Web to the flange,thereby dividing the shell into four eapaasillle portions. The interioroi. the shell is inversely inclined, the outer portion inclining; fromthe center out warilly and. thelowor portion 8, from the cor or toward.the inner end. 'Locatcd o l 'he inner end is an inversely inelined autslthreaded. to receive the screw threaded end of a belt or stub 10, and ifthe scribed. the shell is inserted within the perfo-v ration formed inthe object to which the bolt is to be attached with the not 111 itsextreme inner position.

when upon further revolution of the bolt, the not will. travel up theinclined sides of the shell, and. separate the sections to the desiredexpansion. value, as it obviates the necessity-0t providing a bearingfor the head of the bolt in order to draw the nutwlthiu the ehel, as itis often desirable to employ a stub bolt as shown in Fig. 8, andlirsteecure the same in place before adding an eject tobe securedthereto.

In order to provide for a double grip of the I shell withir theperforation, there is provided a3; expander 1.2,Wl2ih is located in theouter This arrangement is of great l1 radial wings; 11, to enter slots6, 1

The belt is screwed through the not, until the-end contacts with theWell,

end of the shell-and has an inverse inclinar tion to that of the portion7 ofthe shell,

whereby when the expander is forced into the shell, an equal distance tothe "draw of the nut, there is an equal expansion, and ec oeq uently allgoal grip, along the eutiredength of the shell. Expander 1 2 ispreferably formed.

shell to its 'fullextent, to allow the shell to contract to its smallestdiameter, protrudes through the shell to serve as a means for forcingthe expander into the shell.

The advantage of theinvention will be apparent. First, it allows ofexpanding the lower end without first interposing a block or objectbetween the head and shell; second, it

allows of the use of a'nut of any desired. exterior formation; and,third, it provides for a double grip, or in other words, a grip of theshell alike at each end; and finally, it issimple in construction andinexpensive in manufacture.

What I claim is- 1. luau expansion bolt, a sectional shell havingoppositely inclined inner face and a rigid transverse end web, meansupon the web for securing the sections ,in assembled position, a nut inthe shell, and means for movingthe nut, and expanding the shell.

2. In an expansion bolt, a shell formed of two sections, each sectionhavinga rigid transverse Web expansibly connected together, an

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inversely inclinedv nut, and a bolt passing through the nut andcontacting with the web. 3. In an expansion belt, a shell having anoppositely inclined inner face, an end Web at one end, and a concentricring at the opposite end, a nut and an expander inthe casing theexpanderbeing held from displacement by the concentric ring,and a boltpassing through said expander and screwed into the nut.

4. In an expansion bolt, a shell having an inversely inclined interiorsurface, a nut and an expander in the shell, the expander having amanual application, and a bolt passing through the same and screwed intothe nut, by which means the nut is moved.

5. In an expansion belt, a shell having inclined interior faces, andpolygonal sides expanders in the same of corresponding shape in crosssection, and means for moving the expanders, and expanding the shell.

I In testimony that I claim the foregoing as 'my own I hereby affix mysignature in presence of two witnesses.

ISAAC CHURCH.

lVitnesses'z, vWILLIA WEBSTER, CARROLL J WEBSTER.

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